/* ═════════════════════════════════════════════════════════════
   NTMK REBUILD — DIAGNOSTIC ASSESSMENT & SKILL ANALYTICS STYLES
   Phase 03A — Mobile-First, Accessible, Theme-Aware
   ═════════════════════════════════════════════════════════════ */

.diag-container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 1rem;
}

/* ═════════════════════════════════════════════════════════════
   1. WELCOME SCREEN
   ═════════════════════════════════════════════════════════════ */
.diag-welcome-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.95) 0%, rgba(15, 23, 42, 0.98) 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 32px 30px;
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.35);
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
  color: #f8fafc;
}

.diag-welcome-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-teal), var(--brand-indigo));
}

.diag-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.diag-badge-pill.primary {
  background: var(--brand-primary-soft);
  color: var(--brand-primary);
}

.diag-badge-pill.warning {
  background: var(--color-warning-soft);
  color: var(--color-warning);
}

.diag-badge-pill.success {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.diag-badge-pill.error {
  background: var(--color-error-soft);
  color: var(--color-error);
}

.diag-welcome-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 0.75rem 0 0.5rem 0;
  letter-spacing: -0.02em;
}

.diag-welcome-desc {
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 760px;
  margin-bottom: 1.5rem;
}

.diag-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.diag-form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.diag-form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

.diag-select, .diag-input {
  background: var(--bg-surface-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.9rem;
  font-size: 0.95rem;
  color: var(--text-main);
  font-family: inherit;
  transition: border-color var(--trans-fast);
}

.diag-select:focus, .diag-input:focus {
  outline: none;
  border-color: var(--border-focus);
}

.diag-blueprint-specs {
  background: var(--bg-surface-secondary);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.diag-spec-item {
  display: flex;
  flex-direction: column;
}

.diag-spec-item .spec-label {
  font-size: 0.75rem;
  color: #94a3b8 !important;
  text-transform: uppercase;
  font-weight: 600;
}

.diag-spec-item .spec-val {
  font-size: 1.15rem;
  font-weight: 700;
  color: #f8fafc !important;
  margin-top: 0.2rem;
}

.diag-disclaimer-box {
  background: rgba(245, 158, 11, 0.08);
  border-left: 3px solid var(--color-warning);
  padding: 0.75rem 1rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.diag-btn-primary {
  background: var(--brand-primary);
  color: var(--text-on-primary);
  border: none;
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--trans-fast);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
}

.diag-btn-primary:hover:not(:disabled) {
  background: var(--brand-primary-hover);
  transform: translateY(-1px);
}

.diag-btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.diag-btn-secondary {
  background: var(--bg-surface-secondary);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  padding: 0.65rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--trans-fast);
}

.diag-btn-secondary:hover {
  background: var(--bg-surface-hover);
}

/* ═════════════════════════════════════════════════════════════
   2. WORKSPACE SCREEN
   ═════════════════════════════════════════════════════════════ */
.diag-workspace-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 860px) {
  .diag-workspace-layout {
    grid-template-columns: 1fr;
  }
}

.diag-main-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
}

.diag-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.diag-timer-badge {
  font-size: 0.9rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  background: var(--bg-surface-secondary);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.diag-timer-badge.urgent {
  background: var(--color-error-soft);
  color: var(--color-error);
  border-color: var(--color-error);
  animation: pulseTimer 1.5s infinite;
}

@keyframes pulseTimer {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.diag-autosave-pill {
  font-size: 0.75rem;
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.diag-progress-bar-wrap {
  width: 100%;
  height: 6px;
  background: var(--bg-surface-secondary);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.diag-progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-teal));
  transition: width 0.3s ease;
}

.diag-question-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1rem;
}

.diag-question-number {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--brand-primary);
  text-transform: uppercase;
}

.diag-question-meta {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.diag-question-prompt {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-main);
  margin-bottom: 1.5rem;
}

/* MCQ Options */
.diag-mcq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.diag-mcq-option {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.9rem 1.15rem;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border-subtle);
  background: var(--bg-surface);
  cursor: pointer;
  transition: all var(--trans-fast);
  user-select: none;
}

.diag-mcq-option:hover {
  background: var(--bg-surface-secondary);
  border-color: var(--brand-primary-hover);
}

.diag-mcq-option.selected {
  background: var(--brand-primary-soft);
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 1px var(--brand-primary);
}

.diag-option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--bg-surface-secondary);
  color: var(--text-sub);
  flex-shrink: 0;
}

.diag-mcq-option.selected .diag-option-letter {
  background: var(--brand-primary);
  color: var(--text-on-primary);
}

.diag-option-text {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-main);
}

/* True/False Statement Table */
.diag-tf-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 0.5rem;
  margin-bottom: 2rem;
}

.diag-tf-row {
  background: var(--bg-surface-secondary);
  border-radius: var(--radius-md);
}

.diag-tf-row td {
  padding: 0.85rem 1rem;
}

.diag-tf-btn-group {
  display: inline-flex;
  gap: 0.4rem;
}

.diag-tf-choice-btn {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--trans-fast);
}

.diag-tf-choice-btn.selected.true {
  background: var(--color-success);
  color: white;
  border-color: var(--color-success);
}

.diag-tf-choice-btn.selected.false {
  background: var(--color-error);
  color: white;
  border-color: var(--color-error);
}

/* Short Answer Input */
.diag-sa-wrap {
  margin-bottom: 2rem;
}

.diag-sa-input {
  width: 100%;
  max-width: 320px;
  font-size: 1.15rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border-subtle);
  background: var(--bg-surface-secondary);
  color: var(--text-main);
  font-weight: 600;
}

.diag-sa-input:focus {
  outline: none;
  border-color: var(--brand-primary);
  background: var(--bg-surface);
}

/* Navigation Buttons */
.diag-nav-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.25rem;
}

/* Question Palette Sidebar */
.diag-palette-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
}

.diag-palette-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.diag-palette-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.diag-palette-btn {
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface-secondary);
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--trans-fast);
}

.diag-palette-btn.current {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 2px var(--brand-primary-soft);
  font-weight: 800;
}

.diag-palette-btn.answered {
  background: var(--brand-primary);
  color: white;
  border-color: var(--brand-primary);
}

/* ═════════════════════════════════════════════════════════════
   3. RESULT & REPORT SCREEN
   ═════════════════════════════════════════════════════════════ */
.diag-result-hero {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(13, 148, 136, 0.08));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.diag-score-display {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.diag-score-big {
  font-size: 3rem;
  font-weight: 900;
  color: var(--brand-primary);
  line-height: 1;
}

.diag-score-denom {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-dim);
}

.diag-skills-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
}

.diag-skills-table th {
  text-align: left;
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.diag-skills-table td {
  padding: 0.85rem 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.9rem;
  color: var(--text-main);
}

.diag-status-pill {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
}

.diag-status-pill.needs_foundation {
  background: var(--color-error-soft);
  color: var(--color-error);
}

.diag-status-pill.developing {
  background: var(--color-warning-soft);
  color: var(--color-warning);
}

.diag-status-pill.proficient {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.diag-status-pill.strong {
  background: var(--brand-indigo-soft);
  color: var(--brand-indigo);
}

.diag-status-pill.insufficient_evidence,
.diag-status-pill.not_assessed {
  background: var(--bg-surface-secondary);
  color: var(--text-dim);
}

/* Knowledge Gaps Cards */
.diag-gap-card {
  border-left: 4px solid var(--color-error);
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.diag-gap-card.blocker {
  border-left-color: #dc2626;
  background: rgba(239, 68, 68, 0.03);
}

.diag-gap-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.4rem;
}

.diag-gap-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.diag-gap-body {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.5;
}

/* Responsive tweaks */
@media (max-width: 640px) {
  .diag-welcome-card { padding: 1.25rem; }
  .diag-main-card { padding: 1.25rem; }
  .diag-welcome-title { font-size: 1.35rem; }
  .diag-score-big { font-size: 2.25rem; }
}

.diag-select option { background: #0f172a; color: #f8fafc; }
.diag-blueprint-specs {
  background: rgba(15, 23, 42, 0.6) !important;
  border: 1px solid rgba(255, 255, 255, 0.08) !important;
  border-radius: 14px !important;
}
.diag-spec-val { color: #f8fafc !important; }
.diag-spec-label { color: #94a3b8 !important; }
.diag-disclaimer-box {
  background: rgba(245, 158, 11, 0.1) !important;
  border: 1px solid rgba(245, 158, 11, 0.25) !important;
  color: #fbbf24 !important;
  border-radius: 12px !important;
}

.diag-welcome-card .diag-welcome-title {
  color: #f8fafc !important;
}
.diag-welcome-card .diag-welcome-desc {
  color: #94a3b8 !important;
}
.diag-welcome-card .diag-form-group label {
  color: #cbd5e1 !important;
}
.diag-welcome-card .diag-spec-val {
  color: #f8fafc !important;
}
.diag-welcome-card .diag-spec-label {
  color: #94a3b8 !important;
}